Greg Hastings' Tournament Paintball Max'd is a Game Boy Advance paintball game. Developed for a handheld system, it likely simplifies the complexities of full-scale paintball simulation, focusing on core gameplay aspects like aiming, shooting and managing paint.  The Trashman release suggests this could be a homebrew version or one with less official distribution.

Greg Hastings' Tournament Paintball Max'd (U)(Trashman)

Grand Theft Auto Advance (E)(Rising Sun)